Engine started stuttering

[roadrunner6t9]

The engine has startted stuttering on and off whether its at constant throttle or accelerating, gently or going for it. Any ideas why this is. It happened about 5 miles after I put some more fuel in it, I was thiking it may be bad fuel but dont want to risk driving it if it could be something else.

Any ideas guys?

Cheers

RR

[maximtaylor]

Loose earth lead on battery?

[cjr]

loads off black smoke out the bavk? check your map sensor is connected little black box on near abs unit, pipe goes to plenum inbetween tps and bacv.